Wrench



May 27, 1930. F. H. DlcKsoN WRENCH Filed Jan. 21, 1930 -H -u E i Unir erstes rerenr erica 1 ApploationVledzannary,21, 193C'.` Serial No:422,397.`

` The present invention relates to'ivrenohes,

` erspeeiallyoi theStillson type, and aiins to provide a Wren :l1 comprisinga novel asseinbly of the Component elements whereby the 5 parts ofthe Wrench may be readily assembled and separated.

A further object iste provide a` novel detaehablepivot joint between the handle shank `and traine, which will eliminate the use/of a l 10 rivet, bolt or siinilar pivot element, and which Willprovide a strong connection and one which will permit the traine and shank to he readily separated. j

A further object is the provision of springs i assembled `With the freine and handle shank in a novel manner, not only to permit the i springs to he readily removed, but alsoto avoid rivets, screws or other securing elements for the springs and holes in the shank,`whioh j holes in the shanks of Stillson Wrenches heretoifore in use have resulted in such Shanks breaking at the points Where the shanks are weakened by the holes, When the shanlts are subjected to abnormal bending;` strain.

lvVith the foregoing' and other objects in view, which Will be apparent as the deserij tion proceeds, therinveiltion resides in the construction and arrangen'ient of parte, as

hereinafter described and Claimed, it heing` understood that changes eanbe made with! in the scope of what is elaiined Without de- )artineV from the s iirit of the invention.

n. L .lheinventionis illustrated in the aceoinpanying;` drawing, wherein?- Figure l isa side elevation of the iin'- `proved Stilison Wrench. p

Figs. 2 and 3 are cross sections on the respective lines 2-2 and 3-`3 oi' nig. l.

Lhis a fragmentary side elevation illustratingmodifications) In general 'respects the Wrench is similar to the Well-known Stillson type of Wrench, and ooinprises thehandle shank l having,` a i toothed` jaw 2 at its outer end, a 'frame 3 through which the shank extends, a flat screw `stein et having a toothed javv 5 at its outer end complementing the javv 2, and a nut 6 Within an opening Tof the traine threaded on the, sterne to adjust the jaw `5 toward and ""50 away from the' jaw 2 for gripping pipes,`

rods, and other objeetsof diii'erent diameters.

rlhe handle shank and traine areiunially pivoted together to pern'iitfof relative swinging` motion hetvveen the jaws so that they` will tightly grip a pipe,`rod or other circular object. .Rivets are frequently used to provide the pivotaleonneetion, hut they are objection-I able in making` the separationof the 'fra-nie and shank difieult. In carrying ont the present invention the shank l is provided innne diately in rear ot tliejavvf With outstandf` ing pivot studs?) at `opposite sides,"land`the traine?) i provided With .bayonet slots 9 in its opposite sides `to receive said studs. The bayonet `slots open at the 'forward orouter portion of the freine and their tails extend transversely ofthe Wrench toward `the shank l, the shank l and stein 4 extending through Vthe 'frame for `oscillatory motion therein.

j When the stern d is removed frointhe nfranie by unscreivingthe nut 6 therefrom, the studs 8 are readily nioved into the bayonet slots 9, and seated in the Closed ends thereof, thereby pibviding` a pivot connection between the traine and shank. The steingtrnay then he inserted into the iframe and the niit 6 within? the opening` 7 threaded on said stein, thereby 1 nd traine troni beoinin g detached accidentally", althongh they may ily separated When theI shank 4t is de` taohed rointhefraine. The parts 1,3, fr and 6` inay thus', be readily assembled and 'sepa-` rated Without permanent Connections betvteenl thein suchi as rivets, boltsor the like. l Y rllhe rarne 3 has thickened portions i0 at the opposite sides extending aerossthe open endsoif` the slots` 9 i'or purpose o'i strength, and to alsoprovide a `seatfor the nut 6.v The frame jis provided at therear thereof with a `poiiionll connecting the sides of the -i'rraine betWeenthe shank l and `stein ,4,"and `his portion is nsed for the eonneetioitoii one" otthesprings. This springl is'eonoposedof` a dat resilient strip having the portion, kl2 seating` against `the shank lwithin thefrittingland the spring" hasvthe bent portion or leaf 1B extendingacross,thefportionll and provided vvith a hookflli` engaging said portion to retai`n` the spring `in,plaee,`the opposite end of the spring abutting "the portion of the preventing; the shan l" waarin l shank 1 which has the studs 8. The terminal 13 of the doubled spring tends to flex away from the shank 1 to apply pressure to the portion 11 of the frame, and by pressing the terminal 13 toward the shank 1 the hook 14 may be disengaged from the portion 11 of the frame, to permit the spring to be slipped out for repair or replacement.

A second spring, also formed from a resilent strip, has the diverging terminals or arms 15 connected by an offset portion 16 which is seated in a notch 17 in the cross portion 18 of the frame 3 at that side of the shank opposite to the stem i and spring l2.

The arms 15 of the spring bear against the shank 1 and the intermediate portion of the spring pressing against the portion 18 of the frame tends to swing or move the frame in the corresponding direction. The two springs thus oppose one another and yieldingly maintain the frame and shank in an intermediate position, permitting yielding action in either direction.

By pressing the spring 15,716 toward the shank it may be disengaged from the notch or seat 17, for removing the spring conveniently.

Neither spring requires holes in or securing elements entering the shank, so that the shank is not weakened, and either spring may j be conveniently removed for repair or replacement. v

' Fig. 4 illustrates a modification in that the `spring 12 has thehook 14 of the bent back portion 13 entering a notch in the portion 11 of the rame 3 instead of engaging the end of said portion. The other spring has an oppositely offset portion V16 betweenv the arms 15 which is disposed astride the portion 18 of the frame. Both springs are readily removable.

The present improvements provide a wrench which is stronger and sturdier than wrenches heretofore placed on the market, and also havin less parts in its construction and requiring ewer operations in manufacture, although the wrench is highly eiiicient and effective in the performanceof its duties. The parts of the wrench are readilyv assembled and separated, without the aid of tools, andthe handle shank is especially strong so as to withstand excessive strains without breaking. The improvements eliminate `all drill press work, there being no holes drilled in any of the parts, audrivets and other securing elements for the springs and pivot are eliminated, not only for purpose of strength, but to also reduce the cost of manufacture. i

1 1 The lthickenedportions 10 are preferably .provided with outstanding lugs 19 adjacent to and projecting ybe ond the nut 6, in order that when the wrenc is laid on a floor, table `or other surface and is kicked aboutor accidentally moved, vthe nut V6 will notbe turned.V

Thus, the wrench in being laid on either side will be supported on the corresponding lug 19, which spaces the nut 6 above the floor, table or other surface.

Having thus described the invention, what is claimed as new is:

1. A wrench comprising a frame having bayonet slots, a handle shank extending through the frame and having pivot studs removably seated in said slots, a stem eX- tending through the frame, and a nut on the stem in said frame, the stem and shank having complementing jaws, said slots and stem bein(r so arranged that when the stem is in the frame the studs'are prevented from being removed from said slots and when the stem is removed from the frame the studs are movable out of said slots.

2, A wrench comprising a frame, a handle shank extending through the frame and having a jaw at one end and outstanding pivot studs at opposite sides near said jaw, the frame having bayonet slots in which said studs are removably seated, said slots opening at that portion of the frame adjacent to said jaw, a stem extending through the frame and having a jaw complementing the aforesaid j aw, and a nut on the stem in said frame.

In testimony whereof I hereunto aiX my signature.

FRANK H. DICKSON. 

